Não informado. (1971). Official Gazette of the United States Patent and Trademark Office. U.S. Department of Commerce.
Chicago Style (17. basım) AtıfNão informado. Official Gazette of the United States Patent and Trademark Office. Washington: U.S. Department of Commerce, 1971.
MLA (8th ed.) AtıfNão informado. Official Gazette of the United States Patent and Trademark Office. U.S. Department of Commerce, 1971.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..